Who would win a fight a Siberian tiger a lion or a giant black bear?

The giant black bear would first attack the lion and try to rip it to pieces with its razor sharp claws and teeth, but the lion's strength could injure the giant black bear. Since the giant black bear is bigger than the lion, the giant black bear would win the fight with the lion. As the giant black bear gets injured, the siberian tiger attacks it by clawing it down. In this scenario, the siberian tiger would win the fight.